From 9140cc7b19ee1eddde576ff18d486b6e7a3f6170 Mon Sep 17 00:00:00 2001
From: Chris Mihelich <cmihelic@google.com>
Date: Fri, 7 Jun 2024 12:27:00 -0700
Subject: Demangle complex floating-point literals.

PiperOrigin-RevId: 641324572
Change-Id: Ie266da9c8c702e62b89352d64870fb41d2ea76c3
---
 absl/debugging/internal/demangle.cc | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

(limited to 'absl/debugging/internal/demangle.cc')

diff --git a/absl/debugging/internal/demangle.cc b/absl/debugging/internal/demangle.cc
index 6507afb5..184d89fb 100644
--- a/absl/debugging/internal/demangle.cc
+++ b/absl/debugging/internal/demangle.cc
@@ -2476,8 +2476,15 @@ static bool ParseExprCastValueAndTrailingE(State *state) {
   }
   state->parse_state = copy;
 
-  if (ParseFloatNumber(state) && ParseOneCharToken(state, 'E')) {
-    return true;
+  if (ParseFloatNumber(state)) {
+    // <float> for ordinary floating-point types
+    if (ParseOneCharToken(state, 'E')) return true;
+
+    // <float> _ <float> for complex floating-point types
+    if (ParseOneCharToken(state, '_') && ParseFloatNumber(state) &&
+        ParseOneCharToken(state, 'E')) {
+      return true;
+    }
   }
   state->parse_state = copy;
 
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